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Active NPI 1700812005 Individual Practitioner Male Practitioner

Dr. Charles E. Irwin , MD

Pediatrics • San Francisco, CA

Professional Overview & Biography Verified Profile Summary

Dr. Charles Irwin, MD is a registered healthcare professional specializing in Pediatrics in San Francisco, CA. Practice services are available at ACC 400 PARNASSUS AVE. 2ND FL. under active NPI credentials.

Practice Location & Contact Primary Location

Practice Address

Acc 400 Parnassus Ave. 2nd Fl.

San Francisco, CA 941430001

Telephone 4153532002
Fax 4153532466
Associated Practice Facility / Clinic

Specialty Benchmarks & Practice Insights

Comparative analytics for Pediatrics in San Francisco, CA

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 14.4 Yrs
State Avg: 22.5 Yrs
Regional Practice Density
530 Specialists

Practicing in San Francisco, CA (9612 Statewide)

Telehealth Adoption Rate
1.9% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

Pediatrics Primary Specialty

NUCC Taxonomy Code: 208000000X

State License CA G23139

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Pediatrics - Adolescent Medicine

NUCC Taxonomy Code: 2080A0000X

State License CA G23139

A pediatrician who specializes in adolescent medicine is a multi-disciplinary healthcare specialist trained in the unique physical, psychological and social characteristics of adolescents, their healthcare problems and needs.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
00G231390 (CA)

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

17 Associated Practitioners
Dr. Lisa Hornberger , MD

Pediatrics - Pediatric Cardiology

NPI 1033287453

Doctor of Medicine (M.D.)

Dr. Colbey Ricklefs , MD

Pediatrics - Adolescent Medicine

NPI 1053948257

Doctor of Medicine (M.D.)

Dr. Kyrra Engle , MD

Student in an Organized Health Care Education/Training Program

NPI 1093455073

Doctor of Medicine (M.D.)

Dr. Jennifer Carlson , MD

Pediatrics - Adolescent Medicine

NPI 1134157431

Doctor of Medicine (M.D.)

NPI 1134158686

Doctor of Medicine (M.D.)

NPI 1154351674

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 09, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 09, 2007

Registered at ACC 400 PARNASSUS AVE. 2ND FL., SAN FRANCISCO, CA 941430001 (Tel: 4153532002)

📍
Updated Business Mailing Address July 09, 2007

Registered at 1635 DIVISADERO STREET, SUITE 625, BOX 1821, SAN FRANCISCO, CA 941430001 (Tel: 4154764029)

👤
Provider Name / Credentials Updated July 09, 2007

Recorded as CHARLES IRWIN, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 09, 2007

Pediatrics (License #G23139 in CA)

🟢
Initial NPI Registration & Enumeration June 25, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1700812005
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 25, 2006
Last Update: July 13, 2026
Sole Proprietor: No

Mailing Address

1635 Divisadero Street, Suite 625, Box 1821

San Francisco, CA 941430001

Phone: 4154764029

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.